29 lines
987 B
C
29 lines
987 B
C
#ifndef IPC_H
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#define IPC_H
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/* This header file defines constants for MINIX inter-process communication.
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* These definitions are used in the file proc.c.
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*/
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#include <minix/com.h>
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/* Masks and flags for system calls. */
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#define NON_BLOCKING 0x0080 /* do not block if target not ready */
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/* System call numbers that are passed when trapping to the kernel. */
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#define SEND 1 /* blocking send */
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#define RECEIVE 2 /* blocking receive */
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#define SENDREC 3 /* SEND + RECEIVE */
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#define NOTIFY 4 /* asynchronous notify */
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#define SENDNB 5 /* nonblocking send */
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#define SENDA 16 /* asynchronous send */
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/* The following bit masks determine what checks that should be done. */
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#define CHECK_DEADLOCK 0x03 /* 0000 0011 : check for deadlock */
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#define WILLRECEIVE(target, source_ep) \
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((RTS_ISSET(target, RECEIVING) && !RTS_ISSET(target, SENDING)) && \
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(target->p_getfrom_e == ANY || target->p_getfrom_e == source_ep))
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#endif /* IPC_H */
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